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经营范围
发明名称
Holding back pressure on the vent line in a blow out preventer control system
摘要
申请公布号
GB2094858(A)
申请公布日期
1982.09.22
申请号
GB19820004788
申请日期
1982.02.18
申请人
KOOMEY INC
发明人
分类号
E21B33/06;E21B34/16;(IPC1-7):E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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